The Zgrip Z-Mount Zwivel comes with a black 4.5 inch rod and a Z-Mount Zwivel 2 to attach to any 15mm rod. The Zwivel 2 allows you to change the angle between the two 15mm rods at set points turning 365 degrees using a pin locking mechanism. The Zwivel 2 has two levers which control each 15mm hole. In order to change the angle of the rods, just loosen either of the levers and the internal spring separates the parts for you to adjust to the desired angle. The handgrip fully articulates at a ball joint via the red quick release lever.